function custom_login_logo() {
	echo '<style type="text/css">
	.login h1 a { background-image: url("http://craveacademy.com/wp-content/uploads/wordpress-logo.png") !important; }
	</style>';
}
add_action('login_head', 'custom_login_logo');

function custom_login_url(){
	return 'http://www.craveacademy.com/';
}
add_filter('login_headerurl', 'custom_login_url');

function custom_login_logo_title(){
	return 'Crave Academy';
}
add_filter('login_headertitle', 'custom_login_logo_title');

This allows you to change the logo, title text, and url for the login logo in wordpress.

Custom login page changes for Wordpress

login, css, wordpress

PHP